A solar proton storm (S3) is already in progress after a powerful X-class solar flare. Now NOAA warns a SEVERE G4 geomagnetic storm is possible the night of Jan 19–20, when a CME from an X1.9 long-duration flare hits Earth. Aurora may be visible across northern U.S. states—and camera-visible color could reach as far south as AZ, TX & SoCal. Charge phones and look north! https://spaceweather.com/

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